Unit 2 Test review guide

Front

Does this represent a function?

Back

No, a relation is not a function if any input is associated with more than one output.

Front

Which point is NOT a solution to the graph? (-4,4), (-3,7), (-2,10), (6,1)

Back

(6,1) is not a solution to the graph.

Front

What is the equation of the line through (3,-2) with slope of 5?

Back

y + 2 = 5(x - 3) is the equation of the line.

Front

What is the y-intercept of the line displayed by the graph?

Back

The y-intercept is the point where the line crosses the y-axis, which is 1.

Front

In the equation y = -3x + 7, what is the y-intercept?

Back

The y-intercept is 7.

Front

What is a function?

Back

A function is a relation where each input has exactly one output.

Front

How do you find the slope of a line?

Back

The slope is found by taking the difference in y-values divided by the difference in x-values between two points on the line.

Front

What does the y-intercept represent in a linear equation?

Back

The y-intercept represents the value of y when x is 0.

Front

What is the standard form of a linear equation?

Back

The standard form is Ax + By = C, where A, B, and C are integers.

Front

How can you determine if a graph represents a function?

Back

Use the vertical line test: if a vertical line intersects the graph at more than one point, it is not a function.